A scope adjustment calculating apparatus and method for calculating adjustment to a scope on a firearm is disclosed. The scope adjustment calculating device displays multiple input criteria including: a plurality of division of minute of angle for a scope, a plurality of distance from a target data, and a plurality of shot placement spacing data. Known information of given division of minute of angle for a scope, given distance from a target, and given shot placement spacing from the target center point are selected from the input criteria. Based on this known information, a given number of adjustment increments needed to zero the scope is obtained from the calculating device, and the scope is zeroed based on the given number of adjustment increments.

 
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